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Merge "Disable bind mounts for data and obb if FUSE BPF is available" am: b9f8aefbb9

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Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1907695

Change-Id: I6867f9941c2e98023999b11edf5d0e2f67949840
This commit is contained in:
Treehugger Robot 2021-12-02 20:34:59 +00:00 committed by Automerger Merge Worker
commit f0bde5767c
3 changed files with 17 additions and 7 deletions
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1
Utils.h
View file

@ -36,6 +36,7 @@ namespace vold {
static const char* kVoldAppDataIsolationEnabled = "persist.sys.vold_app_data_isolation_enabled";
static const char* kExternalStorageSdcardfs = "external_storage.sdcardfs.enabled";
static const char* kFuseBpfEnabled = "persist.sys.fuse.bpf.enable";
/* SELinux contexts used depending on the block device type */
extern char* sBlkidContext;

20
model/EmulatedVolume.cpp
View file

@ -49,6 +49,7 @@ EmulatedVolume::EmulatedVolume(const std::string& rawPath, int userId)
mRawPath = rawPath;
mLabel = "emulated";
mFuseMounted = false;
mFuseBpfEnabled = base::GetBoolProperty(kFuseBpfEnabled, false);
mUseSdcardFs = IsSdcardfsUsed();
mAppDataIsolationEnabled = base::GetBoolProperty(kVoldAppDataIsolationEnabled, false);
}
@ -60,6 +61,7 @@ EmulatedVolume::EmulatedVolume(const std::string& rawPath, dev_t device, const s
mRawPath = rawPath;
mLabel = fsUuid;
mFuseMounted = false;
mFuseBpfEnabled = base::GetBoolProperty(kFuseBpfEnabled, false);
mUseSdcardFs = IsSdcardfsUsed();
mAppDataIsolationEnabled = base::GetBoolProperty(kVoldAppDataIsolationEnabled, false);
}
@ -359,10 +361,12 @@ status_t EmulatedVolume::doMount() {
}
}
// Only do the bind-mounts when we know for sure the FUSE daemon can resolve the path.
res = mountFuseBindMounts();
if (res != OK) {
return res;
if (!mFuseBpfEnabled) {
// Only do the bind-mounts when we know for sure the FUSE daemon can resolve the path.
res = mountFuseBindMounts();
if (res != OK) {
return res;
}
}
ConfigureReadAheadForFuse(GetFuseMountPathForUser(user_id, label), 256u);
@ -416,9 +420,11 @@ status_t EmulatedVolume::doUnmount() {
if (mFuseMounted) {
std::string label = getLabel();
// Ignoring unmount return status because we do want to try to unmount
// the rest cleanly.
unmountFuseBindMounts();
if (!mFuseBpfEnabled) {
// Ignoring unmount return status because we do want to try to
// unmount the rest cleanly.
unmountFuseBindMounts();
}
if (UnmountUserFuse(userId, getInternalPath(), label) != OK) {
PLOG(INFO) << "UnmountUserFuse failed on emulated fuse volume";

3
model/EmulatedVolume.h
View file

@ -64,6 +64,9 @@ class EmulatedVolume : public VolumeBase {
/* Whether we mounted FUSE for this volume */
bool mFuseMounted;
/* Whether the FUSE BPF feature is enabled */
bool mFuseBpfEnabled;
/* Whether to use sdcardfs for this volume */
bool mUseSdcardFs;